Butts Fire grows to 3,200 acres in Napa County

<div class="meta image-caption"><div class="origin-logo origin-image kgo"><span>KGO</span></div><span class="caption-text">Crews battle a rapidly spreading fire off Butts Canyon Rd in Napa County.</span></div>
Crews are battling a surging wildfire in rural Northern California that has burned more than 4 square miles, damaged five structures and prompted mandatory evacuations.

State fire spokeswoman Stacie McCambridge says the fast-moving blaze began shortly before noon Tuesday in the Pope Valley area of Napa County. It spiked to 2,700 acres by late Tuesday. Then grew to 3,200 acres by Wednesday morning.

Officials say state firefighters and crews from Napa, Lake and Solano counties spent the day on Tuesday working in 90-degree weather as they contained 30 percent of the fire. Cooler temperatures and higher humidity reduced fire activity from what it had been earlier in the day on Tuesday, allowing crews to make good progress. The fire continues to burn northeast into Lake County toward Snell Peak.

McCambridge says several residents living in two communities have been evacuated because 380 structures are threatened.

Five structures have also been destroyed, but it wasn't immediately clear whether they were homes or other buildings.

No injuries have been reported. The cause of the fire hasn't been found. Evacuations remain in effect along Butts Canyon Rd as well as the Berryessa Estates area.

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